EP3916217A1 - Windturbinenschaufel und verfahren zur entscheidung der anordnung des wirbelgenerators an der windturbinenschaufel - Google Patents

Windturbinenschaufel und verfahren zur entscheidung der anordnung des wirbelgenerators an der windturbinenschaufel Download PDF

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Publication number
EP3916217A1
EP3916217A1 EP20176942.9A EP20176942A EP3916217A1 EP 3916217 A1 EP3916217 A1 EP 3916217A1 EP 20176942 A EP20176942 A EP 20176942A EP 3916217 A1 EP3916217 A1 EP 3916217A1
Authority
EP
European Patent Office
Prior art keywords
wind turbine
fins
turbine blade
fin
pair
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20176942.9A
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English (en)
French (fr)
Inventor
Motoshi HARADA
Kenji Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vestas Offshore Wind AS
Original Assignee
Vestas Offshore Wind AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vestas Offshore Wind AS filed Critical Vestas Offshore Wind AS
Priority to EP20176942.9A priority Critical patent/EP3916217A1/de
Publication of EP3916217A1 publication Critical patent/EP3916217A1/de
Withdrawn legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D1/00Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06Rotors
    • F03D1/0608Rotors characterised by their aerodynamic shape
    • F03D1/0633Rotors characterised by their aerodynamic shape of the blades
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D1/00Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06Rotors
    • F03D1/0608Rotors characterised by their aerodynamic shape
    • F03D1/0633Rotors characterised by their aerodynamic shape of the blades
    • F03D1/0641Rotors characterised by their aerodynamic shape of the blades of the section profile of the blades, i.e. aerofoil profile
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00Components
    • F05B2240/20Rotors
    • F05B2240/30Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05B2240/306Surface measures
    • F05B2240/3062Vortex generators
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction

Definitions

  • the present disclosure relates to a wind turbine blade and a method of deciding arrangement of vortex generators for the wind turbine blade.
  • Patent Document 1 discloses a wind turbine blade aiming at suppressing occurrence of a drag penalty, which is a drag generated by a vortex generator.
  • Patent Document 1 JP2019-78192A
  • a wind turbine blade according to at least one embodiment of the present disclosure is a further modification of the wind turbine blade disclosed in Patent Document 1 described above, and an object thereof is to provide a wind turbine blade having high aerodynamic performance and a method of deciding arrangement of vortex generators for the wind turbine blade.
  • a wind turbine blade including a plurality of vortex generators.
  • the plurality of vortex generators include a plurality of fins. A fin closest to a blade tip of the plurality of fins is positioned between a blade root, and a middle position between the blade tip and the blade root.
  • the plurality of fins include at least one first fin arranged in a region satisfying 0 ⁇ r/R ⁇ 0.1 and 0 ⁇ x/c ⁇ 0.2, and at least one second fin arranged in a region satisfying 0.1 ⁇ r/R ⁇ 0.3 and 0.1 ⁇ x/c ⁇ 0.5.
  • a method of deciding arrangement of vortex generators for a wind turbine blade is a method of deciding arrangement of a plurality of vortex generators for a wind turbine blade, including a step of deciding arrangement of a plurality of fins included in the plurality of vortex generators.
  • the step includes a step of deciding arrangement of at least one first fin in a region satisfying 0 ⁇ r/R ⁇ 0.1 and 0 ⁇ x/c ⁇ 0.2, and a step of deciding arrangement of at least one second fin in a region satisfying 0.1 ⁇ r/R ⁇ 0.3 and 0.1 ⁇ x/c ⁇ 0.5.
  • a wind turbine blade having high aerodynamic performance and a method of deciding arrangement of vortex generators for the wind turbine blade are provided.
  • an expression of relative or absolute arrangement such as “in a direction”, “along a direction”, “parallel”, “orthogonal”, “centered”, “concentric” and “coaxial” shall not be construed as indicating only the arrangement in a strict literal sense, but also includes a state where the arrangement is relatively displaced by a tolerance, or by an angle or a distance whereby it is possible to achieve the same function.
  • an expression of an equal state such as “same”, “equal”, and “uniform” shall not be construed as indicating only the state in which the feature is strictly equal, but also includes a state in which there is a tolerance or a difference that can still achieve the same function.
  • an expression of a shape such as a rectangular shape or a cylindrical shape shall not be construed as only the geometrically strict shape, but also includes a shape with unevenness or chamfered corners within the range in which the same effect can be achieved.
  • FIG. 1 is a schematic view showing the overall configuration of a wind turbine generator 90 including wind turbine blades 1 according to an embodiment.
  • the wind turbine generator 90 includes a tower 96 mounted on a foundation 97, a nacelle 95 disposed at the upper end of the tower 96, and a wind turbine rotor 93 rotatably supported by a bearing (not shown) disposed in the nacelle 95.
  • the wind turbine rotor 93 includes a hub 94 and the plurality of wind turbine blades 1 disposed on the outer peripheral side of the hub 94 at intervals in a circumferential direction of the wind turbine rotor 93.
  • FIG. 2 is a schematic view showing the overall configuration of the wind turbine blade 1.
  • the wind turbine blade 1 includes a wind turbine blade main body 2 and a plurality of vortex generators 10 disposed on the surface of the wind turbine blade main body 2 (may simply be referred to as a "blade surface” hereinafter).
  • the wind turbine blade main body 2 includes a blade root 3 attached to the hub 94, a blade tip positioned farthest from the blade root 3, and an airfoil part 5 extending between the blade root 3 and the blade tip.
  • the outer shape of the wind turbine blade main body 2 is formed by a pressure side 8 connecting a leading edge 6 and trailing edge 7 of the wind turbine blade 1, and a suction side 9 connecting the leading edge 6 and the trailing edge 7 on an opposite side to the pressure side 8.
  • the plurality of vortex generators 10 are mounted on the suction side 9 of the wind turbine blade 1. Moreover, the plurality of vortex generators 10 are arranged along a direction crossing a blade chord direction of the wind turbine blade 1 and forms an array 14 of the vortex generators 10. Moreover, the vortex generator 10 closest to the blade tip 4 of the array 14 of the vortex generators 10 is positioned between the blade root 3, and a middle position P between the blade tip 4 and the blade root 3. The middle position P corresponds to a position half a blade total length L.
  • the "blade total length L” means the total length of the wind turbine blade 1, that is, the length L from the blade root 3 to the blade tip 4 of the wind turbine blade 1.
  • the "radial direction” refers to a radial direction of the wind turbine rotor 93
  • the "blade chord direction” refers to a direction along a chord (chord line) connecting the leading edge 6 and trailing edge 7 of the wind turbine blade 1 (may simply be referred to as a “chord direction” hereinafter).
  • a region 100 where the vortex generators 10 are mounted on the surface of the wind turbine blade main body 2 includes a first region M and a second region N which is closer to the blade tip 4 than the first region M.
  • the arrangement of the vortex generators 10 is decided by a method suitable for each of the regions M, N.
  • the maximum blade thickness ratio is high, and it is difficult to accurately predict a transition position and separation position of a flow along the blade surface.
  • numerical calculation is performed here by using a CFD analysis as a flow analysis for each of a blade sound state, where the blade surface is smooth, and a blade degradation state, where the blade surface is rough.
  • operation conditions variable speed operation condition, rated wind speed condition
  • the first region M and the second region N may not necessarily be adjacent to each other, and it is also possible to interpose the third region between the first region M and the second region N.
  • FIG. 3A is a view showing a cross-section of the wind turbine blade 1 and a flow along the blade surface in the second region N under the variable speed operation condition.
  • FIG. 3B is a view showing the cross-section of the wind turbine blade 1 and the flow along the blade surface in the second region N under the rated wind speed operation condition.
  • an angle of attack ⁇ under the rated wind speed condition is larger than an angle of attack ⁇ opt under the variable speed operation condition. That is, the angle of attack ⁇ indicating a state under the rated wind speed condition is larger than the angle of attack ⁇ (optimum angle of attack ⁇ opt ) indicating a state under the variable speed operation condition.
  • the angle of attack ⁇ is an angle between a wind inflow direction and a chord 21 of the wind turbine blade 1 on the cross-section of the wind turbine blade 1.
  • a transition position 22B and separation position 23B of the flow along the blade surface in a case where the angle of attack ⁇ is relatively large shift to the side of the leading edge 6 of the wind turbine blade 1, as compared with a transition position 22A and separation position 23A of the flow along the blade surface in a case where the angle of attack ⁇ is relatively small (see FIG. 3A ). Therefore, the transition position 22B and the separation position 23B at the time of the rated wind speed shift to the side of the leading edge 6 of the wind turbine blade 1, as compared with the transition position 22A and the separation position 23A at the time of the variable speed operation.
  • the position of the vortex generator 10 in the second region N is decided between the trailing edge 7 and the transition position 22A at the time of the variable speed operation. Furthermore, the position of the vortex generator 10 in the second region N is decided at a position closer to the leading edge 6 than the separation position 23B under the rated wind speed condition.
  • the transition position and separation position of the flow along the blade surface are offset to the side of the leading edge 6.
  • the position of the vortex generator 10 is closer to the leading edge 6 than the separation position 23B under the rated wind speed condition in the blade degradation state, it is possible to enjoy an effect of the vortex generator 10 and to improve a lift-drag ratio, regardless of the degradation state of the wind turbine blade 1.
  • a design wind speed is a design target of the vortex generator 10.
  • the numerical calculation is performed assuming a steady constant wind speed and rotor speed. Then, the numerical calculation captures the separation line, a transition of a boundary layer from a laminar flow to a turbulent flow, vortex shedding from the vortex generator 10, a separation delay by the vortex generator 10, and Annual Energy Production (AEP).
  • FIG. 4 is a graph showing a position of a separation line where a separation occurs in the flow along the blade surface in the wind turbine blade 1.
  • the abscissa indicates a ratio r/R of a radial direction position r to a radius R of the wind turbine rotor 93 (see FIG. 1 ), and the ordinate indicates a ratio x/c of the chord direction position x to a chord length c of the wind turbine blade 1.
  • the radial direction position r is a position in the radial direction of the wind turbine rotor 93 with reference to a rotation center of the wind turbine rotor 93.
  • the chord direction position x is a position in the chord direction with reference to the leading edge 6 of the wind turbine blade 1.
  • a single-dotted chain line indicates a position of the separation line calculated by a CFD analysis under the conditions of a design peripheral speed ratio and the blade sound state
  • a double-dotted chain line indicates a position of the separation line calculated by the CFD analysis under the conditions of a rated peripheral speed ratio and the blade sound state
  • a solid line indicates a position (average position) of the separation line determined by a result of a tuft test.
  • the position of the separation line indicated by the result of the tuft test is between the two separation lines indicated by two results of the CFD analysis respectively, and the results of the CFD analysis substantially match the result of the tuft test.
  • the CFD analysis cannot capture the separation line.
  • the vortex generator 10 is desirably added to a range satisfying 0.2 ⁇ r/R ⁇ 0.25.
  • FIG. 6 is a graph showing the relationship between the above-described ratio r/R and an Angle of Attack (AoA) of the wind turbine blade 1.
  • AoA Angle of Attack
  • the angle of attack at the rated peripheral speed ratio is larger than the angle of attack at the design peripheral speed ratio, and in the range of 0.15 ⁇ r/R, the angle of attack in the tuft test is between the angle of attack at the rated peripheral speed ratio and the angle of attack at the design peripheral speed ratio in the CFD analysis.
  • FIG. 7 is a graph showing the arrangement of the array 14 of the vortex generators 10.
  • the abscissa indicates the above-described ratio r/R
  • the ordinate indicates the above-described ratio x/c.
  • a solid line indicates the arrangement of the array 14 of the vortex generators 10 according to an embodiment
  • a dashed line indicates arrangement of the array of the vortex generators 10 (arrangement of the array of the vortex generators 10 determined by the results of the CFD analysis) according to a reference embodiment.
  • the array 14 of the vortex generators 10 is linearly arranged in a region satisfying 0.05 ⁇ r/R ⁇ 0.25 and 0 ⁇ x/c ⁇ 0.5. Moreover, a position of each of the vortex generators 10 is determined based on the results of the CFD analysis in a region satisfying 0.05 ⁇ r/R ⁇ 0.15, and is determined at a position shifted to the side of the leading edge 6 of the wind turbine blade 1 based on the result of the tuft test with respect to the position determined by the results of the CFD analysis. Moreover, in a range satisfying 0.20 ⁇ r/R ⁇ 0.25, while the vortex generators 10 are not disposed in the reference embodiment, the vortex generators 10 are disposed in the embodiment. In both the embodiment shown in FIG. 6 and the reference embodiment, the vortex generators 10 are not disposed in a range satisfying r/R>0.25.
  • the chord direction position x of each of the plurality of vortex generators 10 is a position decided based on the results of the CFD analysis in a region satisfying r/R ⁇ 0.2, and is a position shifted to the side of the leading edge 6 of the wind turbine blade 1 with respect to the position determined by the results of the CFD analysis (the position indicated by the dashed line in FIG. 7 ) in a region satisfying 0.15 ⁇ r/R ⁇ 0.3.
  • a change in angle of attack is not so large in the range of 0.2 ⁇ r/R ⁇ 0.25, as compared with the range of 0.15 ⁇ r/R ⁇ 0.19.
  • the vortex generator 10 is desirably added to the range satisfying 0.2 ⁇ r/R ⁇ 0.25 shown in FIG. 4 , it is reasonably derived that the position of the vortex generator 10 is arranged linearly with a small change with regard to the chord direction position x which is the position of the embodiment shown in FIG. 7 .
  • FIG. 8 is a graph showing the relationship between an average wind speed and an increase rate of Annual Energy Production ( ⁇ AEP).
  • ⁇ AEP Annual Energy Production
  • the Annual Energy Production is estimated to improve by 0.2% in an average annual wind speed.
  • an increase rate of Annual Energy Production by optimizing the position of the vortex generator 10 is estimated at +0.25% in the average annual wind speed.
  • the increase rate of the Annual Energy Production is estimated at +0.35% based on aerodynamic data of an airfoil.
  • FIG. 9 is a schematic perspective view showing a configuration example of the vortex generator 10.
  • each of the plurality of vortex generators 10 of the wind turbine blade 1 includes a fin set 25 formed by a pair of adjacent fins 12A, 12B and a platform 11 for supporting the pair of fins 12A, 12B. That is, the plurality of vortex generators 10 of the wind turbine blade 1 includes the plurality of fins 12 and the plurality of platforms 11, the plurality of fins 12 include the plurality of fin sets 25 each formed by the pair of fins 12A, 12B, and each of the platforms 11 is disposed for a corresponding one of the fin sets 25 so as to support the pair of fins 12A, 12B.
  • the platform 11 has a disc shape.
  • the plurality of fins 12 of the wind turbine blade 1 are arranged along the direction crossing the blade chord direction and forms an array 16 of the fins 12.
  • the fin 12 closest to the blade tip 4 of the plurality of fins 12 of the wind turbine blade 1 is positioned between the blade root 3, and the middle position P between the blade tip 4 and the blade root 3 (see FIG. 2 ).
  • S is an interval between respective trailing edges 19 of the pair of fins 12A, 12B
  • H is a height of each of the pair of fins 12A, 12B
  • FIG. 10 is a plan view of the vortex generator 10 shown in FIG. 9 .
  • the pair of fins 12A, 12B are arranged plane-symmetrically with respect to a plane K along the chord direction of the wind turbine blade 1.
  • an angle ⁇ formed by a fin chord 24 of each of the plurality of fins 12 with respect to the wind inflow direction d satisfies 12° ⁇ 18°.
  • the fin chord 24 is a line segment connecting a leading edge 17 of the fin 12 and the trailing edge 19 of the fin 12.
  • FIG. 11 is a schematic view showing an array pitch of fin sets.
  • Z is an array pitch of two adjacent fin sets 25A, 25B of the plurality of fin sets 25, and S is the interval between the respective trailing edges 19 of the pair of fins 12A, 12B, 1.5 ⁇ Z/S ⁇ 3.0 is satisfied.
  • the vortex generators 10 In order to improve the effect of suppressing separation, it is desirable to arrange the vortex generators 10 in high density. On the other hand, in order to reduce the drag, it is desirable to arrange the vortex generators 10 in low density. Thus, by arranging the vortex generators 10 in density satisfying 1.5 ⁇ Z/S ⁇ 3.0, it is possible to achieve both the effect of suppressing separation and the effect of suppressing the increase in drag.
  • Z is the array pitch of the two adjacent fin sets 25 of the plurality of fin sets 25, and H is the height of each of the pair of fins 12A, 12B, 6.0 ⁇ Z/H ⁇ 8.0 is satisfied.
  • the fins 12 of the vortex generators 10 are arranged in high density.
  • the effect of suppressing separation may be reduced due to interference among generated longitudinal vortexes.
  • H is the height of each of the pair of fins 12A, 12B, 0.02 ⁇ H/R ⁇ 0.07 is satisfied.
  • H is the height of each of the pair of fins 12A, 12B, and C (not shown) is a maximum chord length of the wind turbine blade, 0.3% ⁇ H/C ⁇ 0.9% is satisfied.
  • the maximum chord length C of the wind turbine blade 1 is a maximum chord length of the chord length c of the wind turbine blade 1.
  • FIG. 12 is a view showing a part of the array 14 of the vortex generators 10.
  • the plurality of platforms 11 of the plurality of vortex generators 10 include a first platform 11A, a second platform 11B arranged adjacent to the first platform 11A between the first platform 11A and the middle position P, and a third platform 11C arranged adjacent to the first platform 11A between the first platform 11A and the blade root 3.
  • a straight line connecting a position Q1 and a position Q2 is defined as a first straight line V1.
  • the position Q1 is closest to the second platform 11B in the first platform 11A.
  • the position Q2 is closest to the first platform 11A in the second platform 11B.
  • a straight line connecting the position Q1 and a position Q3 is defined as a second straight line V2.
  • the position Q1 in the first platform 11A is closest to the second platform 11B.
  • the position Q3 in the first platform 11A is closest to the third platform 11C.
  • the angle ⁇ between the first straight line V1 and the second straight line V2 in the wind turbine blade 1 is not greater than 20 degrees.
  • the plurality of platforms 11 are thus arranged linearly. However, the above-described positions Q1, Q2, Q3 may not be disposed in a straight line.
  • FIG. 13 is a graph showing the arrangement of the array 16 of the fins 12 of the wind turbine blade 1.
  • the abscissa indicates the above-described ratio r/R
  • the ordinate indicates the above-described ratio x/c.
  • a solid line shown in FIG. 13 corresponds to the embodiment shown in FIG. 7 and indicates the array 16 of the plurality of fins 12.
  • the plurality of fins 12 of the wind turbine blade 1 include at least one first fin 12a arranged in the first region M (Ma) satisfying 0 ⁇ r/R ⁇ 0.1 and 0 ⁇ x/c ⁇ 0.2, and at least one second fin 12b arranged in the second region N (Na) satisfying 0.1 ⁇ r/R ⁇ 0.3 and 0.1 ⁇ x/c ⁇ 0.5.
  • the wind turbine blade 1 having high aerodynamic performance capable of suppressing the increase in drag caused by the vortex generator 10 while suppressing the separation of the flow along the blade surface of the wind turbine blade 1.
  • the plurality of first fins 12a are arranged in the first region M (Ma)
  • the plurality of second fins 12b are arranged in the second region N (Na).
  • the above-described at least one first fin 12a includes the at least one first fin 12a arranged in the first region M (Mb) satisfying 0.03 ⁇ r/R ⁇ 0.1 and 0.05 ⁇ x/c ⁇ 0.19.
  • the above-described at least one second fin 12b includes the at least one second fin 12b arranged in the second region N (Nb) satisfying 0.1 ⁇ r/R ⁇ 0.27 and 0.12 ⁇ x/c ⁇ 0.47.
  • the plurality of fins 12 may be arranged in each of the first region M (Mb) and the second region N (Nb).
  • the plurality of first fins 12a are arranged in the first region M (Mb)
  • the plurality of second fins 12b are arranged in the second region N (Nb).
  • the above-described at least one second fin 12b includes the at least one second fins 12b arranged in the second region N (Nc) satisfying 0.2 ⁇ r/R ⁇ 0.25 and 0.25 ⁇ x/c ⁇ 0.45.
  • the wind turbine blade 1 having high aerodynamic performance capable of suppressing the increase in drag caused by the vortex generator 10 while suppressing the separation of the flow along the blade surface of the wind turbine blade 1.
  • the plurality of second fins 12b are arranged in the second region N (Nc).
  • FIG. 14A is a view showing a position of the first fin 12a on a blade cross-section of the wind turbine blade 1.
  • FIG. 14B is a view showing a position of the second fin 12b on the blade cross-section of the wind turbine blade 1.
  • the above-described at least one first fin 12a includes the at least one first fin 12a arranged so as to satisfy 25° ⁇ 1 ⁇ 50°
  • the above-described at least one second fin 12b includes the at least one second fin 12b arranged so as to satisfy 40° ⁇ 2 ⁇ 90°.
  • the pitch rotation axis O is a rotation axis of the wind turbine blade 1 defining a pitch angle of the wind turbine blade 1.
  • the above-described at least one first fin 12a may include the at least one first fin 12a arranged so as to satisfy 30° ⁇ 1 ⁇ 45°
  • the above-described at least one second fin 12b may include the at least one second fin 12b arranged so as to satisfy 50° ⁇ 2 ⁇ 80°.
  • the above-described at least one first fin 12a may include the plurality of first fins 12a arranged so as to satisfy 25° ⁇ 1 ⁇ 50°, and the above-described at least one second fin 12b may include the plurality of second fins 12b arranged so as to satisfy 40 ⁇ 2 ⁇ 90°.
  • the present disclosure is not limited to the above-described embodiments, and also includes an embodiment obtained by modifying the above-described embodiments and an embodiment obtained by combining these embodiments as appropriate.
  • a flat back airfoil may be adopted for the wind turbine blade 1.
  • the plurality of fins 12 of the wind turbine blade 1 (all the fins 12 of the wind turbine blade 1) may be arranged between the blade root 3 and a starting point G of a flat back of the wind turbine blade 1.
  • the flat back airfoil giving a thickness to the trailing edge 7 is adopted, making it possible to maintain a lift up to a large angle of attack while suppressing separation.
  • separation is less likely to occur in a region between the blade tip 4 and the starting point G of the flat back (a position of a region, where the flat back airfoil is provided, closest to the blade tip 4). If the vortex generators 10 are arranged in the region, a disadvantage in occurrence of drag is likely to dominate.
  • the plurality of fins 12 of the wind turbine blade 1 are arranged between the blade root 3 and the starting point G of the flat back, it is possible to suppress the increase in drag while suppressing separation.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Wind Motors (AREA)
EP20176942.9A 2020-05-27 2020-05-27 Windturbinenschaufel und verfahren zur entscheidung der anordnung des wirbelgenerators an der windturbinenschaufel Withdrawn EP3916217A1 (de)

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EP20176942.9A EP3916217A1 (de) 2020-05-27 2020-05-27 Windturbinenschaufel und verfahren zur entscheidung der anordnung des wirbelgenerators an der windturbinenschaufel

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EP20176942.9A EP3916217A1 (de) 2020-05-27 2020-05-27 Windturbinenschaufel und verfahren zur entscheidung der anordnung des wirbelgenerators an der windturbinenschaufel

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013014082A2 (en) * 2011-07-22 2013-01-31 Lm Wind Power A/S Wind turbine blade comprising vortex generators
EP2799710A1 (de) * 2013-05-03 2014-11-05 General Electric Company Rotorblattanordnung mit Wirbelerzeugern für Windturbine
EP3282120A1 (de) * 2016-08-08 2018-02-14 Mitsubishi Heavy Industries, Ltd. Windturbinenschaufel, windturbinenrotor, windturbinenstromerzeugungsvorrichtung und verfahren zur montage eines wirbelgenerators
EP3473850A1 (de) * 2017-10-20 2019-04-24 Mitsubishi Heavy Industries, Ltd. Verfahren zur bestimmung der anordnungsposition eines wirbelgenerators an einer windturbinenschaufel, verfahren zur herstellung einer windturbinenschaufelanordnung und windturbinenschaufelanordnung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013014082A2 (en) * 2011-07-22 2013-01-31 Lm Wind Power A/S Wind turbine blade comprising vortex generators
EP2799710A1 (de) * 2013-05-03 2014-11-05 General Electric Company Rotorblattanordnung mit Wirbelerzeugern für Windturbine
EP3282120A1 (de) * 2016-08-08 2018-02-14 Mitsubishi Heavy Industries, Ltd. Windturbinenschaufel, windturbinenrotor, windturbinenstromerzeugungsvorrichtung und verfahren zur montage eines wirbelgenerators
EP3473850A1 (de) * 2017-10-20 2019-04-24 Mitsubishi Heavy Industries, Ltd. Verfahren zur bestimmung der anordnungsposition eines wirbelgenerators an einer windturbinenschaufel, verfahren zur herstellung einer windturbinenschaufelanordnung und windturbinenschaufelanordnung
JP2019078192A (ja) 2017-10-20 2019-05-23 三菱重工業株式会社 風車翼へのボルテックスジェネレータの配置位置決定方法、風車翼アセンブリの製造方法及び風車翼アセンブリ

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